Magnetic levitation systems are extensively used, as these systems have advantages like accuracy and frictionless. Magnetic levitation systems are non-linear systems because of the magnetic field. Due to air resistance, heat losses and other impurities the magnetic levitation systems are not accurate completely, there are variations and fluctuations, so a robust control design is needed. Robust control deals with these fluctuations and uncertainties. By different sets of disturbances and uncertainties the efficiency of the robust control of this system is analyzed.